Product Introduction
Magnesia Chrome Brick is a kind of basic refractory material with more than 90% magnesium oxide content and periclase as the main crystal phaseis. For the Magnesia Chrome Brick, the maximum allowed environment temperature is 1700℃. It is mainly divided into common magnesia chrome brick、direct-bonded magnesia chrome brick、re-bonded magnesia chrome brick、semi-re-bonded magnesia chrome brick. Rongsheng’s production indicators are as follows!
Technical Data Of Common Magnesia Chrome Brick
It is made from sintered magnesia and chrome ore, and sintered at high temperature, which is with higher bulk density and stronger thermal resistance than the magnesite brick, widely used in cement rotary kilns, glass kiln regenerators, permanent lining of steel furnace, and permanent lining of refining ladle.
| Item | Specification | |||||
| MG-16A | MG-16B | MG-12A | MG-12B | MG-8A | MG-8B | |
| MgO % | ≥50 | ≥45 | ≥60 | ≥55 | ≥65 | ≥60 |
| Cr2O3 % | ≥16 | ≥16 | ≥12 | ≥12 | ≥8 | ≥8 |
| Apparent Porosity, % | ≤19 | ≤22 | ≤19 | ≤21 | ≤19 | ≤21 |
| CCS, MPa | ≥35 | ≥25 | ≥35 | ≥30 | ≥35 | ≥30 |
| 0.2MPa RUL ℃ | ≥1650 | ≥1550 | ≥1650 | ≥1550 | ≥1650 | ≥1530 |
Technical Data Of Direct-bonded Magnesia Chrome Brick
It is made from high purity magnesia and chromite materials and sintered under the high temperature in the tunnel kiln, it’s widely used in the lining of the RH/DH vessel , cement rotary kiln, glass tank furnace, non-ferrous metal metallurgical furnace, AOD, VOD furnaces, etc.
| Item | Specification | |||
| ZMG-16A | ZMG-12A | ZMG-8A | ZMG-6 | |
| MgO % | ≥60 | ≥68 | ≥75 | ≥75 |
| Cr2O3 % | ≥16 | ≥12 | ≥8 | ≥6 |
| SiO2 % | ≤1.5 | ≤1.5 | ≤1.5 | ≤2.5 |
| Apparent Porosity, % | ≤18 | ≤18 | ≤18 | ≤18 |
| CCS, MPa | ≥40 | ≥45 | ≥45 | ≥45 |
| 0.2MPa RUL℃ | ≥1700 | |||
Technical Data Of Semi-rebonded Magnesia Chrome Brick
It is made from electro fused MgO-Cr2O3 grain, fused magnesia, chromite and some sintered MgO-Cr2O3 grain, then fired at high temperature. It has some characteristics both direct bonded and re-bonded, like dense inner structure, lower porosity, good high temperature strength, thermal shock resistance is better than re-bonded, slag erosion resistance better than direct bonded. It can be used in sidewall of EAF, DH/RH degasser, VOD, LF, AOD’s side wall/bottom or free board and some serious parts like slag line, regenerators of glass furnace, etc.
| Item | Specification | |||
| BMG-26 | BMG-24 | BMG-22 | BMG-20A | |
| MgO % | ≥50 | ≥50 | ≥55 | ≥58 |
| Cr2O3 % | ≥26 | ≥24 | ≥22 | ≥20 |
| SiO2 % | ≤2.0 | ≤2.0 | ≤2.0 | ≤2.0 |
| Apparent Porosity, % | ≤16 | ≤16 | ≤16 | ≤16 |
| CCS, MPa | ≥40 | ≥45 | ≥45 | ≥45 |
| 0.2MPa RUL℃ | ≥1700 | |||
Technical Data Of Re-Bonded Magnesia- Chrome Brick
It is made from fully electro-fused MgO-Cr2O3 grain, and fired under more than 1700 ° C with weak oxidizing atmosphere. It’s a high quality Magnesia Chrome product with excellent strength & volume stability at high temperature, excellent slag corrosion resistance and erosion resistance; widely used in second-refining furnance, like slag line of VOD and AOD, RH/DH’s snorkels and regenerators of glass kiln ,etc.
| Item | Specification | |||||
| DMG-26 | DMG-24 | DMG-22 | DMG-20 | DMG-16 | DMG-12 | |
| MgO % | ≥50 | ≥50 | ≥55 | ≥58 | ≥62 | ≥68 |
| Cr2O3 % | ≥26 | ≥24 | ≥22 | ≥20 | ≥16 | ≥12 |
| SiO2 % | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 | ≤1.5 |
| Apparent Porosity, % | ≤16 | ≤16 | ≤16 | ≤16 | ≤16 | ≤16 |
| CCS, MPa | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 | ≥40 |
| 0.2MPa RUL ℃ | ≥1700 | ≥1700 | ≥1700 | ≥1700 | ≥1700 | ≥1700 |